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Date: Fri, 25 Aug 2017 09:04:37 +0100
From: Mel Gorman <mgorman@techsingularity.net>
Subject: Re: [PATCH v2 0/3] Separate NUMA statistics from zone statistics
Message-ID: <20170825080437.wyikqunw6mtj22hu@techsingularity.net>
References: <1503568801-21305-1-git-send-email-kemi.wang@intel.com>
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In-Reply-To: <1503568801-21305-1-git-send-email-kemi.wang@intel.com>
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To: Kemi Wang <kemi.wang@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, Michal Hocko <mhocko@suse.com>, Johannes Weiner <hannes@cmpxchg.org>, Christopher Lameter <cl@linux.com>, Dave <dave.hansen@linux.intel.com>, Andi Kleen <andi.kleen@intel.com>, Jesper Dangaard Brouer <brouer@redhat.com>, Ying Huang <ying.huang@intel.com>, Aaron Lu <aaron.lu@intel.com>, Tim Chen <tim.c.chen@intel.com>, Linux MM <linux-mm@kvack.org>, Linux Kernel <linux-kernel@vger.kernel.org>

On Thu, Aug 24, 2017 at 05:59:58PM +0800, Kemi Wang wrote:
> Each page allocation updates a set of per-zone statistics with a call to
> zone_statistics(). As discussed in 2017 MM summit, these are a substantial
> source of overhead in the page allocator and are very rarely consumed. This
> significant overhead in cache bouncing caused by zone counters (NUMA
> associated counters) update in parallel in multi-threaded page allocation
> (pointed out by Dave Hansen).
> 

For the series;

Acked-by: Mel Gorman <mgorman@techsingularity.net>

-- 
Mel Gorman
SUSE Labs

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